cmn700: fix encoding_bits for mesh size x or y > 8
Created by: tonykn-arm
If either the X or Y mesh size values of a CMN-700 mesh is greater than eight, then the Node ID should be represented using a 11-bit format with X and Y sizes encoded using 4-bits. So fix the check that determines X and Y bit encoding size.
Signed-off-by: Tony K Nadackal tony.nadackal@arm.com Change-Id: I76f8fb51953005c6b28aacd91e3ad40c728710b7